RB1200 12v and 24v :
What polarity DC?
Can anyone advise the correct procedure for connecting on 12 volt?
What is the amperage?
The manual does not show the polarity nor the amperage to 12v.
Hello12V ; 3A PSU + near J11.
Thank you+pin is closer to side of the router. If you look on the back of the router you can see that one pin is with square base (ground) and other is with round (+).
And as sergejs already replied, 12V 3A PSU.